Add 18/72 and 28/20
1st number: 18/72, 2nd number: 1 8/20
18/72 + 28/20 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
28/20 = 28 × 18/20 × 18 = 504/360 - Add the two like fractions:
90/360 + 504/360 = 90 + 504/360 = 594/360 - 594/360 simplified gives 33/20
- So, 18/72 + 28/20 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+28/20 18/72+56/20 18/72+28/40 54/72+28/20 18/72+84/20 18/72+28/60 90/72+28/20